<template>
  <div class="music-list">
    <div class="back">
      <router-link tag="i" to="/singer" class="icon-back"></router-link>
    </div>
    <h1 class="title">{{title}}</h1>
    <div class="bg-image" :style="bgStyle" ref="bgImage">
      <div class="play-wrapper">
        <div ref="playBtn" v-show="songs.length>0" class="play">
          <i class="icon-play"></i>
          <span class="text">随机播放全部</span>
        </div>
      </div>
      <div class="filter"></div>
    </div>
    <scroll class="list" ref="list">
      <template v-slot:scroll>
        <div class="song-list-wrapper">
          <song-list @select="selectItem" :songs="songs"></song-list>
        </div>
        <div class="loading-container" v-show="!songs.length">
          <loading></loading>
        </div>
      </template>
    </scroll>
  </div>
</template>

<script>
import Scroll from '../../base/scroll/scroll'
import SongList from '../../base/song-list/song-list'
import Loading from '../../base/loading/loading'
// import { mapMutations } from 'vuex'
import {mapActions} from 'vuex'
export default {
  name: 'music-list',
  components: {Loading, SongList, Scroll},
  props: {
    bgImage: {
      type: String,
      default: ''
    },
    songs: {
      type: Array,
      default: null
    },
    title: {
      type: String,
      default: ''
    }
  },
  mounted () {
    this.$refs.list.$el.style.top = `${this.$refs.bgImage.clientHeight}px`
  },
  computed: {
    bgStyle() {
      return `background-image:url(${this.bgImage})`
    }
  },
  methods: {
    ...mapActions([
      'selectPlay'
    ]),
    selectItem(item, index) {
      this.selectPlay({
        list: this.songs,
        index: index
      })
    }
  }
}
</script>

<style lang="stylus" scoped>
  @import "~@/common/stylus/variable"
  @import "~@/common/stylus/mixin"

  .music-list
    position: fixed
    z-index: 100
    top: 0
    left: 0
    bottom: 0
    right: 0
    background: $color-background
    .back
      position absolute
      top: 0
      left: 6px
      z-index: 50
      .icon-back
        display: block
        padding: 10px
        font-size: $font-size-large-x
        color: $color-theme
    .title
      position: absolute
      top: 0
      left: 10%
      z-index: 40
      width: 80%
      no-wrap()
      text-align: center
      line-height: 40px
      font-size: $font-size-large
      color: $color-text
    .bg-image
      position: relative
      width: 100%
      height: 0
      padding-top: 70%
      transform-origin: top
      background-size: cover
      z-index 40
      .play-wrapper
        position: absolute
        bottom: 20px
        z-index: 50
        width: 100%
        .play
          box-sizing: border-box
          width: 135px
          padding: 7px 0
          margin: 0 auto
          text-align: center
          border: 1px solid $color-theme
          color: $color-theme
          border-radius: 100px
          font-size: 0
          .icon-play
            display: inline-block
            vertical-align: middle
            margin-right: 6px
            font-size: $font-size-medium-x
          .text
            display: inline-block
            vertical-align: middle
            font-size: $font-size-small
      .filter
        position: absolute
        top: 0
        left: 0
        width: 100%
        height: 100%
        background: rgba(7, 17, 27, 0.4)
    .bg-layer
      position: relative
      height: 100%
      background: $color-background
    .list
      position: fixed
      top: 0
      bottom: 0
      width: 100%
      background: $color-background
      .song-list-wrapper
        padding: 20px 30px
      .loading-container
        position: absolute
        width: 100%
        top: 50%
        transform: translateY(-50%)

</style>
